body {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    min-width: 1000px;
    z-index: -10;
    zoom: 1;
    background-color: #fff;
    background: url(../img/wallhaven-627114.jpg);
    background-repeat: no-repeat;
    background-size: cover;
    -webkit-background-size: cover;
    -o-background-size: cover;
    background-position: center 0;

}

div {

}

.div1 {
    width: 900px;
    height: 500px;
    background-color: white;
    margin: auto;
    margin-top: 200px;
    border: 15px solid beige;
}

.div2 {
    width: 400px;
    height: 380px;
    margin-left: 240px;
    margin-top: 70px;
    float: left;
    font-size: 25px;
    background-color: beige;
    border-radius: 20px;
}

.div3 {
    width: 130px;
    height: 100px;
    float: right;
    margin-right: 30px;
    font-size: 20px;

}

.left {
    width: 120px;
    text-align: right;
    height: 100px;
}

.right {
    height: 40px;
    width: 100px;
    padding-left: 20px;
}

#username, #password {
    width: 150px;
    height: 30px;
    border: 1px solid #A6A6A6;
    /*边框圆角*/
    border-radius: 5px;
}

#sub {
    width: 80px;
    height: 40px;
    background-color: white;
    border: 1px solid white;
    border-radius: 5px;
    font-size: 22px;
}
p{
    font-size: 18px;
}